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Property, Plant, and Equipment, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2023	May 31, 2022	May 31, 2021
Property, plant and equipment
Property, plant and equipment	$ 102,917	$ 95,581
Less accumulated depreciation	(59,026)	(51,069)
Property, plant and equipment excluding land and land improvements	43,891	44,512
Land and land improvements	493	493
Property, plant and equipment, Net	44,384	45,005
Depreciation expense	11,900	7,600	$ 5,700
Building and building improvements
Property, plant and equipment
Property, plant and equipment	29,660	29,425
Computer software and equipment
Property, plant and equipment
Property, plant and equipment	27,435	27,292
Machinery and equipment
Property, plant and equipment
Property, plant and equipment	17,023	15,453
Placement and evaluation units
Property, plant and equipment
Property, plant and equipment	26,355	21,009
Construction in progress
Property, plant and equipment
Property, plant and equipment	$ 2,444	$ 2,402

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation and depletion of real estate held for productive use and additions or improvements to real estate held for productive use, examples include, but are not limited to, walkways, driveways, fences, and parking lots. Excludes land held for sale.

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